| ABSTRACT | 第6-7页 |
| 摘要 | 第8-10页 |
| ABBREVIATIONS | 第10-11页 |
| 1 INTRODUCTION | 第11-25页 |
| 1.1 Adsorption/precipitation of phosphate on calcite | 第13-16页 |
| 1.1.1 Factors effects the phosphate binding ion exchange on pure calcite | 第15-16页 |
| 1.2 Interaction between calcium and phosphate | 第16-21页 |
| 1.2.1 Factors effects the transformation of P and calcium into calcium orthophosphate | 第18-19页 |
| 1.2.2 Transformation mechanisms of P and calcium into calcium orthophosphates | 第19-21页 |
| 1.3 Inorganic phosphate binding with components of soil | 第21-24页 |
| 1.3.1 Factors affect the binding amounts of inorganic phosphate on loess soil | 第22-23页 |
| 1.3.2 Soil constituents | 第23-24页 |
| 1.4 Rationale and significance | 第24-25页 |
| 2 EXPERIMENTAL PROCEDURE | 第25-33页 |
| 2.1 Water and chemicals | 第25页 |
| 2.2 Syntheses method | 第25-27页 |
| 2.2.1 Calcite | 第25-26页 |
| 2.2.2 Phosphate and carbonate ratios on the transformation of calcium orthophosphates | 第26-27页 |
| 2.3 Soil sample | 第27页 |
| 2.4 Binding studies | 第27-30页 |
| 2.4.1 Calcite | 第27-28页 |
| 2.4.2 Soil | 第28-30页 |
| 2.5 Characterization | 第30-33页 |
| 2.5.1 X-ray diffraction | 第30-31页 |
| 2.5.2 Scanning electron microscopy with energy-dispersive X-ray spectroscopy | 第31页 |
| 2.5.3 Environmental scanning electron microscope with Energy-dispersive X-ray spectroscopy | 第31-32页 |
| 2.5.4 Fourier transform infrared spectroscopy | 第32页 |
| 2.5.5 Magic angle spinning nuclear magnetic resonance | 第32-33页 |
| 2.5.6 X-ray photoelectron spectroscopy | 第33页 |
| 3 RESULTS | 第33-55页 |
| 3.1 Calcite | 第33-36页 |
| 3.1.1 X-ray diffraction | 第33-34页 |
| 3.1.2 Scanning electron microscopy with energy dispersed X-ray | 第34-35页 |
| 3.1.3 Zeta potential and specific surface area(SSA) | 第35-36页 |
| 3.2 Binding amounts of inorganic phosphate on calcite | 第36-39页 |
| 3.3 Effect of P and carbonate ratios on the transformation of calcium orthophosphates | 第39-46页 |
| 3.3.1 Types of synthesized products | 第39-41页 |
| 3.3.2 Morphology and elemental distribution of synthezied products | 第41-43页 |
| 3.3.3 Infrared spectrum of synthesized products | 第43-45页 |
| 3.3.4 P speciation of synthesized products | 第45-46页 |
| 3.4 Binding amounts of P with components of soil | 第46-55页 |
| 3.4.1 Types of soil | 第46-48页 |
| 3.4.2 Phosphorus speciation in tested samples | 第48-49页 |
| 3.4.3 Surface characterization using XPS | 第49-52页 |
| 3.4.4 Morphology and elemental distribution of tested samples | 第52-55页 |
| 4 DISCUSSIONS | 第55-60页 |
| 4.1 Binding amounts of phosphate on calcite | 第55-56页 |
| 4.1.1 Summary | 第55-56页 |
| 4.2 Effect of carbonate and phosphate on the transformation of calcium orthophosphates | 第56-58页 |
| 4.2.1 Summary | 第57-58页 |
| 4.3 Binding amounts of P with components of loess | 第58-60页 |
| 4.3.1 Summary | 第60页 |
| 5 CONCLUSION | 第60-62页 |
| INNOVIATION | 第62页 |
| PROSPECT | 第62-63页 |
| REFERENCES | 第63-71页 |
| APPENDIX | 第71-72页 |
| ACKNOWLEDGEMENT | 第72页 |
